If these devices are YOURS or you have LEGALLY OBTAINED them, then the advice provided by AndOrTech is correct and should work in removing the (system) password that has been set (startup) within the bios.

However, if you have purchased the devices (and they may be stolen, previous company, etc) then they may have additional software “hard-wired” into the bios/security chip which means that you will be required to remove the bios chip/security chip and replace with a new one.

I advise this purely on the grounds that the devices have been legally obtained but were locked prior to purchase.